Magnetization Measurements at High Temperature on Highly Oriented FeSe 0 . 5 Te 0 . 5 Superconductor
| Autor: | D.A. Landínez Téllez, Karciano José Santos Silva, C. A. Parra Vargas, I. M. Capucho, Juliana Nunes Oliveira Pinto, V.T. Abílio, J. Albino Aguiar, C. A. C. Passos, D. Martinez Buitrago |
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| Rok vydání: | 2017 |
| Předmět: |
Superconductivity
Phase transition Materials science Condensed matter physics 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Charge ordering Magnetization Impurity Electrical resistivity and conductivity Phase (matter) 0103 physical sciences Orthorhombic crystal system 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 30:1699-1704 |
| ISSN: | 1557-1947 1557-1939 |
| DOI: | 10.1007/s10948-017-4104-7 |
| Popis: | We have studied the high-temperature magnetic properties of a highly oriented FeSe0.5Te0.5 superconducting sample produced by self-flux method. The sample was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), electrical resistivity, and magnetic measurements. The XRD pattern revealed the formation of the desired crystalline phase. In addition, two minority impurity phases, a FeSe orthorhombic phase and another Fe3O4 magnetite phase, were observed. SEM micrographs showed that the sample was formed in stacked lamellas. Resistivity measurement showed that the onset superconducting temperature occurs at $T_{\mathrm {c}}^{\text {onset} } \sim $ 14 K with a transition width ΔT = 5.5 K. Magnetic measurements at high temperature showed that the FeSe0.5Te0.5 compound presents a ferromagnetic-paramagnetic (FM-PM) phase transition at ∼ 843 K. An anomaly was also observed at ∼ 122 K, which may be associated with the Verwey transition due to the presence of the magnetite phase in the sample. |
| Databáze: | OpenAIRE |
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